/* * Copyright (C) 2009 VMware, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * Measure glTexSubImage2D rate * * Brian Paul * 16 Sep 2009 */ #include "glmain.h" #include "common.h" int WinWidth = 100, WinHeight = 100; static GLuint VBO; static GLuint TexObj = 0; static GLubyte *TexImage = NULL; static GLsizei TexSize; static GLenum TexSrcFormat, TexSrcType; static const GLboolean DrawPoint = GL_TRUE; static const GLboolean TexSubImage4 = GL_TRUE; struct vertex { GLfloat x, y, s, t; }; static const struct vertex vertices[1] = { { 0.0, 0.0, 0.5, 0.5 }, }; #define VOFFSET(F) ((void *) offsetof(struct vertex, F)) /** Called from test harness/main */ void PerfInit(void) { /* setup VBO w/ vertex data */ glGenBuffersARB(1, &VBO); glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO); glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(vertices), vertices, GL_STATIC_DRAW_ARB); glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x)); glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s)); glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); /* texture */ glGenTextures(1, &TexObj); glBindTexture(GL_TEXTURE_2D, TexObj); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glEnable(GL_TEXTURE_2D); } static void UploadTexImage2D(unsigned count) { unsigned i; for (i = 0; i < count; i++) { /* XXX is this equivalent to a glTexSubImage call since we're * always specifying the same image size? That case isn't optimized * in Mesa but may be optimized in other drivers. Note sure how * much difference that might make. */ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexSize, TexSize, 0, TexSrcFormat, TexSrcType, TexImage); if (DrawPoint) glDrawArrays(GL_POINTS, 0, 1); } glFinish(); } static void UploadTexSubImage2D(unsigned count) { unsigned i; for (i = 0; i < count; i++) { if (TexSubImage4) { GLsizei halfSize = (TexSize == 1) ? 1 : TexSize / 2; GLsizei halfPos = TexSize - halfSize; /* do glTexSubImage2D in four pieces */ /* lower-left */ glPixelStorei(GL_UNPACK_ROW_LENGTH, TexSize); glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, halfSize, halfSize, TexSrcFormat, TexSrcType, TexImage); /* lower-right */ glPixelStorei(GL_UNPACK_SKIP_PIXELS, halfPos); glTexSubImage2D(GL_TEXTURE_2D, 0, halfPos, 0, halfSize, halfSize, TexSrcFormat, TexSrcType, TexImage); /* upper-left */ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); glPixelStorei(GL_UNPACK_SKIP_ROWS, halfPos); glTexSubImage2D(GL_TEXTURE_2D, 0, 0, halfPos, halfSize, halfSize, TexSrcFormat, TexSrcType, TexImage); /* upper-right */ glPixelStorei(GL_UNPACK_SKIP_PIXELS, halfPos); glPixelStorei(GL_UNPACK_SKIP_ROWS, halfPos); glTexSubImage2D(GL_TEXTURE_2D, 0, halfPos, halfPos, halfSize, halfSize, TexSrcFormat, TexSrcType, TexImage); /* reset the unpacking state */ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); } else { /* replace whole texture image at once */ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TexSize, TexSize, TexSrcFormat, TexSrcType, TexImage); } if (DrawPoint) glDrawArrays(GL_POINTS, 0, 1); } glFinish(); } /* XXX any other formats to measure? */ static const struct { GLenum format, type; const char *name; } SrcFormats[] = { { GL_RGBA, GL_UNSIGNED_BYTE, "GL_RGBA/GLubyte" }, { GL_BGRA, GL_UNSIGNED_BYTE, "GL_BGRA/GLubyte" }, { 0, 0, NULL } }; /** Called from test harness/main */ void PerfDraw(void) { GLint maxSize; double rate; GLint fmt, subImage; glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxSize); /* loop over source data formats */ for (fmt = 0; SrcFormats[fmt].format; fmt++) { TexSrcFormat = SrcFormats[fmt].format; TexSrcType = SrcFormats[fmt].type; /* loop over glTexImage, glTexSubImage */ for (subImage = 0; subImage < 2; subImage++) { /* loop over texture sizes */ for (TexSize = 16; TexSize <= maxSize; TexSize *= 2) { GLint bytesPerImage; double mbPerSec; bytesPerImage = TexSize * TexSize * 4; TexImage = malloc(bytesPerImage); if (subImage) { /* create initial, empty texture */ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexSize, TexSize, 0, TexSrcFormat, TexSrcType, NULL); rate = PerfMeasureRate(UploadTexSubImage2D); } else { rate = PerfMeasureRate(UploadTexImage2D); } mbPerSec = rate * bytesPerImage / (1024.0 * 1024.0); perf_printf(" glTex%sImage2D(%s %d x %d): " "%.1f images/sec, %.1f MB/sec\n", (subImage ? "Sub" : ""), SrcFormats[fmt].name, TexSize, TexSize, rate, mbPerSec); free(TexImage); } } } exit(0); }